this study examined the environmental impacts of irrigated and rainfed barley agroecosystems of iran based on nitrogen levels by using lca methodology during 1999-2013. four steps includung goal definition and scoping, inventory analysis, life cycle impact assessment and integration & interpretation were considered. impact categories were acidification, eutrophication and global warming. functi...

Models predict that global warming may increase aridity in water-limited ecosystems by accelerating evapotranspiration. We show that interactions between warming and the dominant biota in a grassland ecosystem produced the reverse effect. In a 2-year field experiment, simulated warming increased spring soil moisture by 5-10% under both ambient and elevated CO2. Warming also accelerated the decl...

Understanding uncertainty is essential in using life cycle assessment (LCA) to support decisions. Monte Carlo simulation (MCS) widely used characterize the variability LCA results, be them inventory (LCI), category indicator normalized or weighted results. In this study, we present a new method decompose MCS results into underlying contributors logarithmic mean Divisia index (LMDI) decompositio...

Himalayas, are among the areas most vulnerable to global warming, however, little is knownabout warming impacts on the crops. Therefore, the actual affects of anticipated warming onwinter wheat were tested in Tibet, China. During the period 1988-2012, Tibet region hasexperienced a large increase in daily mean, minimum and maximum temperatures during wheatgrowing seasons by 0.50, 0.67 and 0.51 o...

Using satellite-observed Normalized Difference Vegetation Index (NDVI) dada and station-observed surface air temperature anomalies for the Northern Hemisphere (NH), we analyze the spatio-temporal characteristics of vegetation variations in the Qinghai-Tibet Plateau and their correlations with global warming from 1982 to 2002. It is found that the late spring and early summer (May-June) are the ...